Steam

I tried to sign up for a Facebook account (hate it, but market place seemed like my only option for something I was after) and had my account automatically banned on creation. Twice. They demanded photos of my face, which I begrudgingly gave them, and still never approved my account.

I signed up for a new one with the exact same information from my mobile data plan instead and it worked fine, and I never got banned

Ip address isn't tied to the house, but the subscriber.

But most ISP don't have static Ip for private customers, so you experience just suddenly being banned because you received an Ip address someone got banned.